AI Article Synopsis
- The study conducts a comprehensive QCD analysis of how quarks fragment into pions, focusing on achieving precision at next-to-next-to-leading order (NNLO) accuracy.
- It combines data from electron-positron annihilation and semi-inclusive deep-inelastic scattering for the first time to improve the understanding of these fragmentation functions.
- The researchers investigate the effects of NNLO corrections on the semi-inclusive deep-inelastic scattering data across different kinematic conditions and analyze how this influences the resulting pion fragmentation functions.
Article Abstract
We carry out a global QCD analysis of parton-to-pion fragmentation functions at next-to-next-to-leading order (NNLO) accuracy by performing a fit to the combined set of single-inclusive electron-positron annihilation and, for the first time, semi-inclusive deep-inelastic scattering multiplicity data. For the latter, we utilize the approximate NNLO QCD corrections that were derived recently within the threshold resummation formalism. We explore the impact of the NNLO corrections on the description of the semi-inclusive deep-inelastic scattering datasets in various kinematic regimes and on the resulting pion fragmentation functions.
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| http://dx.doi.org/10.1103/PhysRevLett.129.012002 | DOI Listing |
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